Using multiple domains with Drupal

If you have multiple domains, all going to the same website, you can redirect traffic to your 'primary' or 'default' domain instead of serving the same content on all domains. Google measures your websites authority over the number of links to you website, if you have several domains, some using www. some not, then that authority is spread across all those (sub-)domains.

Another reason to use 301 redirects is that google maps uses a key, that is dependant of the url of the client. Not using this trick, would result in error-popups about an error in your API key on your visitors computer.

So; use 301 redirect to send all visitors to one default domain. Here is how to set it up, it should work for any website, but I have tested it on drupal.

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Courtesy : http://meinit.nl